Knife-sharpener.



E. B. ANDERSON.

KNIFE SHARPENER.

APPLxcAnoN FILED AuG.2.191e.

Fatented Apr. 24, 1917.

ELIAS B. ANDERSON, OF FORRES'ION, ILLINOIS.

KNIFE-SHARPENER.

Specification of Letters Patent.

Patented Apr. 24, 1917.

- Application led. August 2, 1916. Serial No. 112,656.

To all 'whom t may concern.'

Be it known that I, ELIAS B. ANDERSON, a citizen of the United States, residing at Forreston, in the county of Ogle and State of Illinois, have invented certain new and useful Improvements in Knife-Sharpeners, of which the following is a specification.

My invention has reference to knifesharpeners, and is intended for use with the larger class of such implements, such as butcher knives, carving knives and the like. It is simple and durable in construction, and eiiicient in operation.

In the drawings, Figure 1 is a plan view of the base-plate 1, with the other parts removed. Fig. 2 is a plan view of my invention, complete. Fig. 3 is a side view thereof. Fig. 4 is an end view thereof, partly in section on the line m-x of Fig. 2.

1 represents a base-plate, formed of sheetmetal, and provided with an extension 2 by means of which such plate can be secured to a table, shown partially at 3, near the edge thereof. At the opposite side from the member 2 the plate 1 is provided with a pair of tongues 4, adapted to be bent downwardly beneath the edge of the table and secure the outer edge of the plate from movement.

5 is a block of abrading material, held centrally of the plate 1 by means of a pair of overlapping plates 6 having transverse slots 7 near their ends. The plates are drawn downwardly by means of bolts 8, passing through the slots 7 and secured at their lower ends in the plate 1. At their upper ends the bolts 8 are provided with burs 9 by means of which the plate 1, stone 5 and plates 6 can Vbe clamped tightly together.

The plate 1 is provided at its ends with guides 11 and 12, in which are slidable plates 13, having upwardly projected guides 14, at an angle with the side faces of the stone 5. The plates 6 are projected into guides 15, spaced-apart from the plates 14, each pair of plates 14 and 15 forming a guide for the blade of the knife which is being sharpened on the stone. Each of the plates 13 is provided with a slot 16, engaged by a bolt 17 passing upwardly through the plate 1, and provided with a bur 18. By this means the plates 13 can be held in adjusted positions with relation to the stone 5. When the tool is lirst used the plates 14 are set at the nearest point thereto, and as the stone becomes worn such plates can be gradually moved outwardly, bringing an unused part of the stone into operation. As the plates 13 are adjusted the plates 6 can be given a corresponding adjustment to conform therewith. Adjustments can also be made to vary the space between the guides 14 and 15, to conform to the ,varying thicknesses of knife blades.

In operation the blade of the knife is drawn from the inner end .of one of the guides 14 to the outer end thereof, with one side of the cutting edge of the lmife against the stone 5, and then the operation is repeated on the other side of the stone. The stone 5 is of approximately the same length as the guide plates causing a considerable abrasion of the metal at each operation. The device is set so that the outer end of the stone projects slightly over the edge of the table, and the plate 1 is provided on each side of the stone with a recess 19, in line with the movement of the knife on either side of the stone. By this means if the knife is forced downwardly as it leaves the Sharpener there is no danger of its coming in contact with the metal of the plate to the detriment of the edge being placed thereon.

The stone 5 is preferably square in crosssection, and when, two of the sides thereof become worn it can be given a quarter-turn, presenting two unused surfaces for operation upon the knife. The stone can also be split through the center, longitudinally, and the two parts inverted to bring new surfaces into play.

What I claim as my invention, and desire to secure by Letters Patent of the United States, is:

1. A device of the class described, comprising a base-plate adapted to be secured to a table at the edge thereof; an abrading stone supported on said base plate; clampplates engaging said stone and having operative connection with said base-plate; and a pair of guide-plates on opposite sides of said stone, adapted to be adjusted with relation thereto.

2. A device of the class described, comprising a base-plate, adapted to be attached to a table near the edge thereof; an abrading stone supported on said base-plate; clamp-plates engaging said stone and projected laterally into guide-plates; plates slidable on said base-plate and projected upwardly into guide-p1ates coperating with said Erst-named guide-plates; means for ad justment of said guide-plates; and means of adjustment for said clamp-plates.

3. A device of the class described, comprising a base-plate adapted to be attached to the edge of a table and provided with a pair of recesses at its outer edge; an abrading' member supported on said stone with its outer end projecting between said recesses; means for holding said stone rigidly 10 against said plate; a pair of 'guide-plates on opposite sides of said abrading member; and means for adjusting said guide-plates with relation thereto.

In testimony whereof I aiiiX my signature in the presence of two witnesses.

ELIAS B. ANDERSON. Witnesses W. N. HASKELL7 FRANK W. HASKELL.

Copies `of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

